I have Rock-Ola 467. The gripper arm was giving me a problem. At one point it hung up with the tone arm. Took the gripper arm gears and cam apart and cleaned and put back together. It works fine. The tone arm was out of adjustment. Readjusted it. The problem is the tone arm is sticking now. If I raise it manually and swing it, it seems to move freely. When it drops down all the way it seems to catch causing the arm not to advance. Any suggestions?